docker之docker容器flannel模式多网段跨主机通信所遇问题集

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hzy_709862479 2020-01-17 18:27:28 博主文章分类：docker ©著作权

文章标签 docker容器flannel跨网段问 docker无法启动提示Main PI flannel模式docker0无法获 docker Main PID: 97 文章分类 Docker 云计算

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问题一：docker无法启动错误提示： [root@localhost docker.service.d]# systemctl status docker.service
● docker.service - Docker Application Container Engine Loaded: error (Reason: Invalid argument) Drop-In: /usr/lib/systemd/system/docker.service.d └─flannel.conf Active: failed (Result: start-limit) since Fri 2020-01-17 01:18:59 PST; 4min 57s ago Docs: https://docs.docker.com Main PID: 9775 (code=exited, status=1/FAILURE)

Jan 17 01:18:56 localhost.localdomain systemd[1]: docker.service failed. Jan 17 01:18:59 localhost.localdomain systemd[1]: docker.service holdoff time over, scheduling restart. Jan 17 01:18:59 localhost.localdomain systemd[1]: Stopped Docker Application Container Engine. Jan 17 01:18:59 localhost.localdomain systemd[1]: start request repeated too quickly for docker.service Jan 17 01:18:59 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine. Jan 17 01:18:59 localhost.localdomain systemd[1]: Unit docker.service entered failed state. Jan 17 01:18:59 localhost.localdomain systemd[1]: docker.service failed. Jan 17 01:20:37 localhost.localdomain systemd[1]: docker.service has more than one ExecStart= setting, wh...ing. Jan 17 01:21:34 localhost.localdomain systemd[1]: docker.service has more than one ExecStart= setting, wh...ing. Jan 17 01:23:46 localhost.localdomain systemd[1]: docker.service has more than one ExecStart= setting, wh...ing. Hint: Some lines were ellipsized, use -l to show in full. 解决：升级内核： [root@localhost docker.service.d]# yum update -y 升级完成后，卸载旧版本，重新安装docker-ce。 [root@localhost docker.service.d]# rpm -qa |grep docker-ce docker-ce-19.03.5-3.el7.x86_64 docker-ce-cli-19.03.5-3.el7.x86_64 [root@localhost docker.service.d]# rpm -e --nodeps docker-ce-19.03.5-3.el7.x86_64 [root@localhost docker.service.d]# rpm -e --nodeps docker-ce-cli-19.03.5-3.el7.x86_64 [root@localhost docker.service.d]# yum install -y docker-ce-*

[root@localhost docker.service.d]# systemctl start docker

[root@localhost docker.service.d]# systemctl status docker docker正常启动！！！！反思：是否可以先安装flannel，再按照docker-ce，是否会出现类似的情况？待测试！！！！

问题二：docker、flannel正常启动，但docker0无法获取地址池地址。解决：修改/usr/lib/systemd/system/docker.service文件 [root@localhost docker.service.d]# vim /usr/lib/systemd/system/docker.service 添加以下内容：在ExecStart=/usr/bin/dockerd后添加$DOCKER_NETWORK_OPTIONS 在[server]最后添加 EnvironmentFile=/run/flannel/docker 重新启动docker [root@localhost docker.service.d]# systemctl daemon-reload [root@localhost docker.service.d]# systemctl restart docker.service
[root@localhost docker.service.d]# ifconfig docker0正常获取flannel地址池。